Problem: I want to specify that a property should not use a value (eg. an item).
Solution: Create a new constraint 'none of' (as opposed to 'one of').
Current workaround: Using 'conflicts with' and the same property. However, this only makes sense and works for mainsnak. I'd like to check qualifiers and references as well.
| Subject | Repo | Branch | Lines +/- | |
|---|---|---|---|---|
| Add 'none of' constraint | mediawiki/extensions/WikibaseQualityConstraints | master | +267 -0 |
| Status | Subtype | Assigned | Task | ||
|---|---|---|---|---|---|
| Resolved | Ladsgroup | T183092 Make an obvious way of blacklisting a value for a property | |||
| Resolved | Lucas_Werkmeister_WMDE | T194278 Document new constraint types on Wikidata |
Example where this might be useful currently: "website account on" There the blacklist contains the websites where we have a dedicated property.
This query finds all properties which currently use the workaround mentioned in the task description (“conflicts with” own property).
Change 430619 had a related patch set uploaded (by Ladsgroup; owner: Amir Sarabadani):
[mediawiki/extensions/WikibaseQualityConstraints@master] Add 'none of' constraint
Change 430619 merged by jenkins-bot:
[mediawiki/extensions/WikibaseQualityConstraints@master] Add 'none of' constraint
Hmmmm. I'm not seeing a violation indicator on https://wikidata-constraints.wmflabs.org/index.php/Item:Q5#P64.
Are you logged in? Apparently there are no constraint checks on that wiki if you’re not logged in. (Though I’m not sure why – I thought I’d put them in common.js at some point?)